v6.2.0 (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2)

Device OS 6.2.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2).

Released on Oct 15, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

6.2.0

BREAKING CHANGES

• make SYSTEM_THREAD(ENABLED) the default, add deprecation warning on SYSTEM_THREAD() macro use #2834
• Removed deprecated HAL API wrappers after a set of renamings in Device OS 4.x LTS #2834

FEATURES

• Extend Particle.publish() and `Particle.subscribe()`` APIs to support events content types #2804
• Tether API + ModemManager support #2832
• Supports M.2 breakout board and Muon #2809

ENHANCEMENTS

• [gen3] make sure that extended system-part1 is compatible with older bootloaders as well as 6.1.2 #2831
• Improves delay() behavior #2828
• [photon2] ethernet: use 12.5MHz as the default SPI clock rate for W5500 #2835
• [Gen 4] Adds detailed WiFi access point disconnect reason logging #2805
• [ACM] Perform cloud ping or reachability test on network events; non-blocking background reachability test #2811
• [Gen 3] BLE: increase a number of retries for service discovery in central role #2801
• [Gen 3] BLE: suspend scanning while in connected state and restore scanning after a disconnect (SoftDevice limitation) #2801
• [cellular][r510] unmask bands for global use #2803
• BLE: streamlines BLE.scan() behavior to be blocking irrespective of timeout, but allows other BLE operations to be performed #2796
• BLE: streamlines BLE.stopScanning() behavior to be blocking when not called from BLE callback and guarantees scanning to be stopped on return #2796
• [Gen 4] BLE: improves locking in a number of BLE API calls #2813
• [Gen 3] Muon/M.2 breakout support enabled for Gen 3 SoMs #2808

BUGFIXES

• [Gen 3] BLE: fixes a race condition in connected state reporting in central and peripheral roles #2801
• [Gen 4] i2c: use transactions for fuelgauge and pmic on platforms with single i2c bus to avoid cutting into compound application I2C transmissions #2822
• Reduce latency of the system loop #2797
• Work around a bug in lfs_remove() while recursive traversing directories #2798
• [Gen 4] set sleep timer upper bounds #2810
• [Gen 4] Fixes potential deadlock in WiFi and BLE stacks #2805
• [Gen 4] fixes DMA enabled USART flush #2800
• [Gen 4] Fixes BLE.stopScanning() deadlock when called from inside BLE callback #2796
• [Gen 4] i2c: clear I2C tx buffer before each transmission #2819
• fixes USART::available() after waking from sleep #2816
• [Gen 4] fixes BLE race condition while scanning #2818
• [Gen 4] usb: fix an issue with USB re-attach after sleep #2824 #2823
• [Gen 4] prebootloader: fix STOP/ULP sleep with disabled KM0 RTOS, get correct wake-up reason #2825
• Fixes I2C hal issues #2826

INTERNAL

• Remove access_token query param from Device OS makefile #2833
• Add serial loopback to test runner #2816
• [tests] Support integration tests on gen4 after device-constants update #2814
• Adds fixture tests #2823
• [tests] ACM prefer feature, adjust logging #2795

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v6.2.0/particle_device-os@6.2.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.9.0 (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2)

Device OS 5.9.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2).

Released on September 9th, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.9.0

FEATURES

• Supports M.2 breakout board and Muon #2809

ENHANCEMENTS

• [Gen 4] Adds detailed WiFi access point disconnect reason logging #2805
• [ACM] Perform cloud ping or reachability test on network events; non-blocking background reachability test #2811
• [Gen 3] BLE: increase a number of retries for service discovery in central role #2801
• [Gen 3] BLE: suspend scanning while in connected state and restore scanning after a disconnect (SoftDevice limitation) #2801
• [cellular][r510] unmask bands for global use #2803
• BLE: streamlines BLE.scan() behavior to be blocking irrespective of timeout, but allows other BLE operations to be performed #2796
• BLE: streamlines BLE.stopScanning() behavior to be blocking when not called from BLE callback and guarantees scanning to be stopped on return #2796
• [Gen 4] BLE: improves locking in a number of BLE API calls #2813

BUGFIXES

• [Gen 3] BLE: fixes a race condition in connected state reporting in central and peripheral roles #2801
• [Gen 4] i2c: use transactions for fuelgauge and pmic on platforms with single i2c bus to avoid cutting into compound application I2C transmissions #2822
• Reduce latency of the system loop #2797
• Work around a bug in lfs_remove() while recursive traversing directories #2798
• [Gen 4] set sleep timer upper bounds #2810
• [Gen 4] Fixes potential deadlock in WiFi and BLE stacks #2805
• [Gen 4] fixes DMA enabled USART flush #2800
• [Gen 4] Fixes BLE.stopScanning() deadlock when called from inside BLE callback #2796
• [Gen 4] i2c: clear I2C tx buffer before each transmission #2819
• fixes USART::available() after waking from sleep #2816
• [Gen 4] fixes BLE race condition while scanning #2818
• [Gen 4] usb: fix an issue with USB re-attach after sleep #2824 #2823
• [Gen 4] prebootloader: fix STOP/ULP sleep with disabled KM0 RTOS, get correct wake-up reason #2825
• Fixes I2C hal issues #2826

INTERNAL

• Add serial loopback to test runner #2816
• [tests] Support integration tests on gen4 after device-constants update #2814
• Adds fixture tests #2823
• [tests] ACM prefer feature, adjust logging #2795

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.9.0/particle_device-os@5.9.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.8.2 (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2)

Device OS 5.8.2 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2).

Released on July 2, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.8.2

FEATURES

• [Gen 4] [rtl872x] Improve coexistence between Wifi and BLE when both are used simultaneously #2764
• [Gen 4] [rtl872x] [BREAKING CHANGE] Backup RAM is no longer automatically written to flash periodically. Backup RAM will be saved when entering sleep. If users are going to reset, hal_backup_ram_sync() should be called first #2766

ENHANCEMENTS

• [eg91e] [eg91ex] enable 921600 baud rate #2782
• [rtl872x] SPI hal: set sample delay for SPI0@25MHz #2784
• [Gen 4] [msom]ACM Behavior changes #2738
• Update heap5 implementation to latest 6d1d9bff207104a8dc2

BUGFIXES

• Fix wifi setup not connecting when in listening mode #2783 #2778
• Resumable OTA fixes #2769
• [quectel] fixes PPP resume during warm boot #2772
• [Gen 4] [bootloader] Implement bootloader reset reasons #2773
• [RTL872x] multiple SPI fixes #2768
• [Gen 4] [rtl872x] Reinitialize internal wifi stack if scan or connect fails #2766 #2760
• [Gen 4] [rtl872x] Resolve deadlock with USB serial monitoring on boot in some cases#2765
• [gen3] hal: fix gpio glitch #2787
• [ACM] Dont change cloud connection to preferred network during OTA update 9abfb7c72
• Avoid malloc/realloc while under ATOMIC_BLOCK in system event subscription 63fcc6b26
• [gen 4] network: Increase rtlkncp thread stack 29433d38c

INTERNAL

• [rtl872x] Display Photon 2 instead of P2, dont allow extended advertising data on rtl platforms #2779
• Add set credentials usb request #2763
• [Gen 4] [rtl872x] Prevent M404/BG95M5 modems from connecting on 2G networks for the time being#2761
• [Gen 4] [rtl872x] Query 2G registration status for M404/BG95M5 modems when querying CGMI #2761
• [Gen 4] Update sdk submoudle ref to fix compiler warnings #2789
• [test] Adjust OTA tests 8ec558e63

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.8.2/particle_device-os@5.8.2.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v6.1.1 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 6.1.1 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on Jun 20, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

6.1.1

FEATURES

• Allow temporarily disabling device protection #2770

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v6.1.1/particle_device-os@6.1.1.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v6.1.0 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 6.1.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on May 3, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

6.1.0

FEATURES

• Ledger #2715 #2756
• [WiFi] WiFi.setCredentials() with credentials validation #2746 #2754 #2758
• [Gen 4] [rtl872x] [BREAKING CHANGE] Backup RAM is no longer automatically written to flash periodically. Backup RAM will be saved when entering sleep. If users are going to reset, hal_backup_ram_sync() should be called first #2766

ENHANCEMENTS

• [Cellular] Improve BG95 connection speed by only setting nwscanseq if needed #2735
• Include IMEI in CTRL_REQUEST_CELLULAR_GET_ICCID control request #2730
• Process system tasks while cloud handshake is in progress #2745

BUGFIXES

• [wiring] Fix incorrect int to bool conversion in WiFi.clearCredentials() #2736
• [Gen 4] [rtl872x] Fix boot loop if system-part module info is corrupted #2739
• [Gen 4] [rtl872x] Fix OTA bounds check, add ota/min_max_app_size test #2742
• Fix std::call_once re-entrancy problem #2743
• Prevent OTA progress events from blocking system thread #2741
• [Gen 4] [rtl872x] Fix WiFi/BLE coexistence and WiFi/BLE stability issues #2747 #2752 #2755 #2754
• [Gen 4] [rtl872x] Fix USB re-enumeration issues #2744 #2752 #2754
• [Gen 4] [rtl872x] Fix incorrect timing of SPI TX-only transaction completion notification #2749 #2757
• [Gen 4] [rtl872x] Fix an issue with micros() and millis() occasionally jumping forward after ~37 hours #2750
• [Cellular] [Quectel] Try to force open PPP channel, helps with warm boot PPP session resume in some cases #2752
• [system] Fix sockfd matching in ACM connectivity manager causing a panic #2755
• [Gen 4] [rtl872x] Fix UART initialization issue with non-32-byte-aligned buffers #2757
• [Gen 4] [rtl872x] Reinitialize internal wifi stack if scan or connect fails #2766 #2760
• [Gen 4] [rtl872x] Resolve deadlock with USB serial monitoring on boot in some cases#2765

INTERNAL

• [Tracker] Disable ESP32 SDIO debug logs #2740
• [GCC] Enable Ledger and filesystem APIs on GCC platform #2737
• Fix monolithic build errors #2751
• [Gen 4] [rtl872x] Upgrade ambd_sdk WiFi and BLE subsystems to 6.2_patch_integrated_231211_25b3bc38 #2752
• Update USB/BLE platform names to use hyphenated notation #2753
• [Gen 4] [rtl872x] Prevent M404/BG95M5 modems from connecting on 2G networks for the time being#2761
• [Gen 4] [rtl872x] Query 2G registration status for M404/BG95M5 modems when querying CGMI #2761

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v6.1.0/particle_device-os@6.1.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.8.0 (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2)

Device OS 5.8.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B-SoM/B5-SoM/Tracker/Tracker-M/E-SoM-X/M-SoM/P2).

Released on March 15, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.8.0

FEATURES

• Ledger #2715 #2756
• [WiFi] WiFi.setCredentials() with credentials validation #2746 #2754 #2758

ENHANCEMENTS

• [Cellular] Improve BG95 connection speed by only setting nwscanseq if needed #2735
• Include IMEI in CTRL_REQUEST_CELLULAR_GET_ICCID control request #2730
• Process system tasks while cloud handshake is in progress #2745

BUGFIXES

• [wiring] Fix incorrect int to bool conversion in WiFi.clearCredentials() #2736
• [Gen 4] [rtl872x] Fix boot loop if system-part module info is corrupted #2739
• [Gen 4] [rtl872x] Fix OTA bounds check, add ota/min_max_app_size test #2742
• Fix std::call_once re-entrancy problem #2743
• Prevent OTA progress events from blocking system thread #2741
• [Gen 4] [rtl872x] Fix WiFi/BLE coexistence and WiFi/BLE stability issues #2747 #2752 #2755 #2754
• [Gen 4] [rtl872x] Fix USB re-enumeration issues #2744 #2752 #2754
• [Gen 4] [rtl872x] Fix incorrect timing of SPI TX-only transaction completion notification #2749 #2757
• [Gen 4] [rtl872x] Fix an issue with micros() and millis() occasionally jumping forward after ~37 hours #2750
• [Cellular] [Quectel] Try to force open PPP channel, helps with warm boot PPP session resume in some cases #2752
• [system] Fix sockfd matching in ACM connectivity manager causing a panic #2755
• [Gen 4] [rtl872x] Fix UART initialization issue with non-32-byte-aligned buffers #2757

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.8.0/particle_device-os@5.8.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v6.0.0 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 6.0.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on January 30, 2024

Note: This is a limited Release and may be used for production with approval from Particle.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

6.0.0

FEATURES

• Protected mode #2734

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v6.0.0/particle_device-os@6.0.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.7.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2)

Device OS 5.7.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2).

Released on January 24, 2024

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.7.0

FEATURES

• Allow duplicates in BLE scan results if requested with BLE.scanWithFilter(BleScanFilter().allowDuplicates(true)) #2718

ENHANCEMENTS

• [P2 / M SoM] BLE: Dynamically adjust radio prioritization when both BLE and WiFi are active improving BLE scanning performance #2714
• ACM preferred()/prefer() API clean up #2717
• [M SoM] Adjust cloud keep-alive based on network connection #2716
• [M SoM] Enable session resumption #2722
• [P2 / M SoM] SPI performance improvements #2728 #2731
• [P2 / M SoM] Ethernet performance improvements #2728 #2731

BUGFIXES

• [P2 / M SoM] BLE scan results should be filtered for duplicates by default #2718
• Fix OpenOCD FreeRTOS thread list access (uxTopUsedPriority) #2723
• [Gen 3] BLE: Fix stack overflow in BLE timer callback #2725
• [Cellular] Fixes parsing of MCC/MNC with 00 or 000 MNC #2726
• [P2 / M SoM] Use security type from JoinNewNetwork request to connect to hidden networks #2724
• [build] include alignment into section size calculations #2719
• [P2 / M SoM] SPI slave mode bugfixes #2728 #2731
• [P2 / M SoM] USB TX hold-off mechanism should account for maximum transmit size #2729
• [P2 / M SoM] USB ISR worker thread priority below network threads priorities #2729

INTERNAL

• [M SoM] Make GNSS burn in test optional #2720
• [M SoM] Support for GNSS FQC test #2721

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.7.0/particle_device-os@5.7.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.6.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2)

Device OS 5.6.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2).

Released on December 7, 2023

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.6.0

FEATURES

• [msom] ACM basic support #2689

ENHANCEMENTS

• [wiring] Add 64-bit string conversions #2693
• [wiring] json: 64-bit support #2695
• [msom] increase NCP baudrate to 921600, doubling throughput #2706
• [network] Wiznet Ethernet performance improvements #2708

BUGFIXES

• [gen3] hal: fixes the issue that UARTE RX may loss data #2698
• [rtl872x] correctly handle SecureFault #2699
• Fixes ncp-client not waiting for modem ready on cold boot #2700
• [system] still pump system loop when SPARK_WLAN_SLEEP=1; Try to drain ISR task queue quicker #2702
• [rtl872x] Fix unintentional pin changes for Serial1 RTS/CTS #2703
• [rtl872x] fix multiple BLE issues #2710
• Asset OTA fixes #2711

INTERNAL

• [services] add long long support to printf/scanf #2694
• fix printf/scanf for floating point numbers, add tests [#2696](#2696
• [msom] support 16MB GD flash #2701
• [msom] Support burnin tests #2704
• [gen3] reduce flash usage #2705
• Erase factory reset app after test runner completes #2709
• Fix dual stack UDP bind behavior with LWIP_IPV6_DEFINES_ONLY #2712
• Update WB makefile version #2713

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.6.0/particle_device-os@5.6.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v4.2.0 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 4.2.0 LTS is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on September 26th, 2023

See documentation about Device OS versions, their current state, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

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4.2.0

ENHANCEMENTS

• [Cellular] Enables UPSV=1 low power mode for R510 when idle for >=9.2s #2674
• [services] add long long support to printf/scanf #2694 #2696
• [wiring] Add 64-bit String conversions #2693 #2657
• [wiring] json: 64-bit support #2695 #2657

BUGFIXES

• Fixes clean target for applications with large number of files + P2 PSRAM size calculation issues #2661
• [gen3] hal: fixes the issue that UARTE RX may lose data #2698
• [quectel] Fixes ncp-client not waiting for modem ready on cold boot #2700

INTERNAL

• [bootloader] remove nanopb dependency #2607
• test] resolve sleep20 test failures. #2669
• [nrf] Add Factory Reset Tests #2662
• Update the key used for validating the ServerMoved signature #2688
• [ci] fix macos builds #2683

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System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v4.2.0/particle_device-os@4.2.0.zip

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Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.